Buletinul Institutului Politehnic din Iași Secția Chimie și Inginerie Chimică ISSN: 2537-2947
ISSN-L: 0254-7104
2025, Volume 71(75), Issue 1 (January), pp. 9 - 22
Layered Double Hydroxides: Insights Into the Structural Regeneration by
Memory Effect
DENIS CUTCOVSCHI, “Gheorghe Asachi” Technical University of Iaşi,
“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental
Protection, Iaşi, Romania SOFRONIA BOUARIU, “Gheorghe Asachi” Technical
University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering
and Environmental Protection, Iaşi, Romania GABRIELA CARJA, “Gheorghe
Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of
Chemical Engineering and Environmental Protection, Iaşi, Romania,
gabriela.carja@academic.tuiasi.ro
Abstract Layered double hydroxides (LDHs) are a unique class of
inorganic compounds, presenting positively charged layers arranged in a
brucite-like structure. These materials are highly versatile due to their
ability to host various anions in the interlayer spaces and accommodate
diverse cations in the layers. As a result, LDHs have broad applications in
fields like drug delivery, water purification, and catalysis. A key
characteristic of LDHs is their structural “memory effect,” which allows
them to restore their original structure after calcination. Factors such as
temperature, pressure, pH, and the specific anions and cations involved
significantly affect the properties of LDHs during regeneration. This work
provides an in-depth review of the properties and uses of LDHs regenerated
through the memory effect, offering insights into how their
physical-chemical features can be tailored. Keywords: Layered double
hydroxide, mixed oxides, structural recovery, memory effect